Table 1: Demographic information.
| Variable | Results (%) |
| Age | mean age | 69.9 (SD 11.1) |
| 20–29 years | 1 (0.3) |
| 30–39 years | 2 (0.7) |
| 40–49 years | 20 (7.2) |
| 50–59 years | 21 (7.6) |
| 60–69 years | 78 (27.6) |
| 70–79 years | 89 (32.4) |
| 80–89 years | 54 (19.7) |
| over 90 years | 4 (1.4) |
| no answer | 5 (1.8) |
| Presence or absence of housemate | yes | 91 (34.3) |
| no | 183 (65.7) |
| Household composition | single-generation family | 131 (47.8) |
| two-generation family. | 55 (20.1) |
| three-generation family | 80 (29.2) |
| other | 5 (1.5) |
| no answer | 3 (1.0) |
| Relationship with the care recipient | parent–child | 105 (37.2) |
| husband–wife | 176 (62.4) |
| other relative | 1 (0.3) |
| Employment situation | employed | 99 (36.2) |
| farmer | 37 (37.4) |
| company employee | 28 (28.3) |
| family-operated business | 22 (22.2) |
| director | 12 (12.1) |
| not employed | 175 (63.8) |
| Financial situation | not a hindrance to life | 216 (78.8) |
| hindrance to life | 56 (20.4) |
| other | 2 (0.7) |
| Subjective judgment of health state | healthy | 162 (59.1) |
| not healthy | 82 (29.9) |
| no answer | 30 (11.0) |
| Nursing care time | mean (SD) | 11.6 (8.4) |
| 1–9 hours | 113 (67.3) |
| 10–19 hours | 47 (17.1) |
| over 20 hours | 48 (17.5) |
| no answer | 66 (24.0) |
| J-ZBI | mean point score (SD) | 32.8 (17.4) |
| SDS | mean point score (SD) | 43.3 (9.6) |
| no or slight depression | 95 (34.7) |
| mild depression | 89 (32.5) |
| moderate depression | 80 (29.2) |
| RSES-J | mean point score (SD) | 17.6 (4.4) |